The magnitude of the charge on a β\betaβ-particle is 1.6 × 10-19 C.
State the proton number and nucleon number of a helium-3 nucleus.
proton number = _________
nucleon number = _________
Determine the magnitude of the charge of a helium-3 nucleus.
charge = _________
A nucleus of thorium-234 consists of 90 protons and 144 neutrons. Thorium-234 is radioactive and decays by β\betaβ-emission to an isotope of protactinium. The symbol for thorium is Th\text{Th}Th and the symbol for protactinium is Pa\text{Pa}Pa.
Write down the nuclide equation for this decay.
The half-life of thorium-234 is 24 days24\text{ days}24 days. A sample contains 4.8 × 10-9 g of thorium-234.
Calculate the mass of thorium-234 remaining in the sample after 96 days96\text{ days}96 days.
484 exam-style questions on CIE IGCSE Physics 5.2 Radioactivity, covering 5.2.1 Background radiation and measuring count rate, 5.2.2a Alpha, beta and gamma emission, 5.2.2b Deflection and ionising effects of nuclear radiation, 5.2.3a Radioactive decay, 5.2.3b Effects of decay on the nucleus and decay equations, 5.2.4a Half-life, 5.2.4b Choosing isotopes for applications, and 5.2.5 Effects of ionising radiation and safety precautions. Each one has a worked solution and a mark scheme showing where the marks go.